diff options
Diffstat (limited to 'gcc/builtins.c')
| -rw-r--r-- | gcc/builtins.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/gcc/builtins.c b/gcc/builtins.c index 603106a..80f2fbb 100644 --- a/gcc/builtins.c +++ b/gcc/builtins.c @@ -509,12 +509,16 @@ expand_builtin_return_addr (enum built_in_function fndecl_code, int count) #else rtx tem; - /* For a zero count, we don't care what frame address we return, so frame - pointer elimination is OK, and using the soft frame pointer is OK. - For a nonzero count, we require a stable offset from the current frame - pointer to the previous one, so we must use the hard frame pointer, and + /* For a zero count with __builtin_return_address, we don't care what + frame address we return, because target-specific definitions will + override us. Therefore frame pointer elimination is OK, and using + the soft frame pointer is OK. + + For a non-zero count, or a zero count with __builtin_frame_address, + we require a stable offset from the current frame pointer to the + previous one, so we must use the hard frame pointer, and we must disable frame pointer elimination. */ - if (count == 0) + if (count == 0 && fndecl_code == BUILT_IN_RETURN_ADDRESS) tem = frame_pointer_rtx; else { |